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Title: Solid-State NMR Studies Reveal Native-like β-Sheet Structures in Transthyretin Amyloid

Journal Article · · Biochemistry
 [1];  [1];  [2];  [2];  [3];  [3];  [4]
  1. East Carolina Univ., Greenville, NC (United States)
  2. National High Magnetic Field Lab. (NHMFL), Tallahassee, FL (United States)
  3. Scripps Research Inst., La Jolla, CA (United States)
  4. Univ. of California, Berkeley, CA (United States)

Structural characterization of amyloid rich in cross-β structures is crucial for unraveling the molecular basis of protein misfolding and amyloid formation associated with a wide range of human disorders. Elucidation of the β-sheet structure in noncrystalline amyloid has, however, remained an enormous challenge. Here we report structural analyses of the β-sheet structure in a full-length transthyretin amyloid using solid-state NMR spectroscopy. Magic-angle-spinning (MAS) solid-state NMR was employed to investigate native-like β-sheet structures in the amyloid state using selective labeling schemes for more efficient solid-state NMR studies. Analyses of extensive long-range 13 C- 13 C correlation MAS spectra obtained with selectively 13 CO- and 13 Cα-labeled TTR reveal that the two main β-structures in the native state, the CBEF and DAGH β-sheets, remain intact after amyloid formation. The tertiary structural information would be of great use for examining the quaternary structure of TTR amyloid.

Research Organization:
East Carolina Univ., Greenville, NC (United States); Scripps Research Inst., La Jolla, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; National Inst. of Health (NIH) (United States); National Science Foundation (NSF)
Grant/Contract Number:
AC02-05CH11231; NS084138; DK34909; AG10770; DK46335; DMR-1157490
OSTI ID:
1377496
Journal Information:
Biochemistry, Vol. 55, Issue 37; ISSN 0006-2960
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (4)

Transthyretin Aggregation Pathway toward the Formation of Distinct Cytotoxic Oligomers journal January 2019
Studies of the Process of Amyloid Formation by Aβ Peptide journal January 2018
Cryo-EM structure of a transthyretin-derived amyloid fibril from a patient with hereditary ATTR amyloidosis journal November 2019
Atomic force microscopy for single molecule characterisation of protein aggregation journal March 2019